As I understand it, the "tune-up" required after the break-in period on a new bike consists pretty much of checking the tension of all the cables, derailleur settings, etc. If you're handy with bike maintenance, you could certainly do that yourself. Even if you're not handy with bike maintenance, there are plenty of sites on the 'net (including this one) where you could learn how to adjust cable tension and the limit screws of your derailleurs. Or, if you're like me and learn better from watching, check any other LBS's in your area to see if any of them do seminars on bike maintenance and gear adjustment.

DebW, velogirl, ladies... I may be way off on this advice, so please correct me if I am.